Process for preparing low unsaturation polyether polyols
US5698746A · kind A · utility
3Cited by
10References
36Claims
0Family size
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Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/324
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyether polyols having reduced terminal unsaturation are prepared in a process comprising a first step of contacting a polyether having allyl terminal unsaturation with an isomerization catalyst whereby the allyl terminal unsaturation of the polyether is reduced by at least 90% conversion to propenyl terminal unsaturation in one step and, in a final step, the resulting polyether product of the first step is contacted with an acid catalyst whereby a substantial amount of the propenyl terminal unsaturation of the polyether is removed and the corresponding polyether having an additional hydroxyl group is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.